AMD Radeon HD 6870M vs AMD Radeon RX 6800M

VS

AMD Radeon HD 6870M

AMD Radeon RX 6800M

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6870M and 12GB VRAM Radeon RX 6800M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870M 's Advantages

Lower TDP (50W vs 145W)

AMD Radeon RX 6800M 's Advantages

Released 10 years and 4 months late

Boost Clock2390MHz

More VRAM (12GB vs 1024GB)

Larger VRAM bandwidth (384.0GB/s vs 64.00GB/s)

1760 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6870M

1.08 TFLOPS

Radeon RX 6800M +1033%

12.24 TFLOPS

Radeon HD 6870M

VS

Radeon RX 6800M

Graphics Card

Jan 2011

Release Date

May 2021

Vancouver

Generation

Mobility Radeon

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

2116 MHz

-

Boost Clock

2390 MHz

1000 MHz

Memory Clock

2000 MHz

Memory

1024MB

Memory Size

12GB

GDDR5

Memory Type

GDDR6

128bit

Memory Bus

192bit

64.00GB/s

Bandwidth

384.0GB/s

Render Config

10

Compute Units

40

-

800

Shading Units

2560

40

TMUs

160

16

ROPs

64

-

RT Cores

40

8 KB (per CU)

L1 Cache

128 KB per Array

256 KB

L2 Cache

3 MB

-

L3 Cache

96 MB

Theoretical Performance

10.80 GPixel/s

Pixel Rate

153.0 GPixel/s

27.00 GTexel/s

Texture Rate

382.4 GTexel/s

-

FP16 (half)

24.47 TFLOPS

1080 GFLOPS

FP32 (float)

12.24 TFLOPS

-

FP64 (double)

764.8 GFLOPS

Board Design

50W

TDP

145W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

Granville

GPU Name

Navi 22

Granville XT (216-0769024)

GPU Variant

Navi 22 XTM

TeraScale 2

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

7 nm

1.04 billion

Transistors

17.2 billion

166 mm²

Die Size

335 mm²

Graphics Features

11.2 (11_0)

DirectX

12 Ultimate (12_2)

4.4

OpenGL

4.6

1.2

OpenCL

2.1

N/A

Vulkan

1.3

-

5.0

Shader Model

6.5

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